Fix user context (#850)

Closes #848

lib/phlex/sgml.rb

@@ -95,7 +95,7 @@ def internal_call(parent: nil, state: nil, &block)
 	end
 
 	def context
-		@_state._state
+		@_state.user_context
 	end
 
 	# Output plain text.

quickdraw/context.test.rb

@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+test "user context passed in from the outside" do
+	example = Class.new(Phlex::HTML) do
+		define_method :view_template do
+			h1 { context[:heading] }
+		end
+	end
+
+	context = { heading: "Hello, World!" }
+	assert_equal_html example.new.call(context:), %(<h1>Hello, World!</h1>)
+end
+
+test "user context passed down" do
+	a = Class.new(Phlex::HTML) do
+		define_method :view_template do
+			h1 { context[:heading] }
+		end
+	end
+
+	b = Class.new(Phlex::HTML) do
+		define_method :view_template do
+			context[:heading] = "Hello, World!"
+			render a.new
+		end
+	end
+
+	assert_equal_html b.new.call, %(<h1>Hello, World!</h1>)
+end